Allen-Bradley PLC-5 User Manual page 170

10-20 Communicating with Devices on a Serial Link
This Field Specifies
Delete mode Select how the controller responds to
a delete character.
XON/XOFF Whether or not you want XON/XOFF
enabled
Echo What the controller should do when it
receives an ASCII delete character
Termination 1 The termination characters you
Termination 2 defined
Append 1 The append characters you defined
Append 2
Publication 1785-UM012D-EN-P - July 2005
Configure by Doing the Following
Select Ignore, CRT, or Printer. If you select Ignore, the controller ignores
the delete character. If you select CRT or Printer, the controller ignores the
character it received immediately before the delete character. The
controller then sends a signal to the CRT or printer to erase the deleted
character. Select CRT or Printer only if you enable the echo mode.
As the controller receives characters, it constantly determines how many
more it can receive without losing any. When XON/XOFF is enabled, the
controller sends a "stop sending character," XOFF. If the sending device
has the XON/XOFF feature, it stops sending characters. When the
controller has more room, it will send a "start sending" character (XON).
Select ENABLED or DISABLED.
If you disable the echo mode, characters received by the controller are
sent only to the echo counter and not to an output device, such as a CRT
or printer. If you enable the echo mode, the controller sends any
characters it receives through an ASCI read or read line instruction to a
waiting output device. For example, if you want the controller to print a
message to a LED marquee, enable the echo mode.
Enter a maximum of two characters (hexadecimal).
Use termination characters with the ASCII Read Line instruction or with
the Test Buffer for Line (ABL) to indicate a line has been entered.
The default character is the ASCII equivalent for [RETURN], 0x0D. You
can also use the ASCII equivalent for LINE FEED (0x0A). To specify no
character, enter \FF.
Enter a maximum of two characters (hexadecimal).
Use append characters with the ASCII Write with Append (AWA)
instruction to indicate the end of a line. Append characters are the last
characters sent after a line of information.
The default characters are the ASCII equivalent for [RETURN] (/0D) and
LINE FEED (/0A). To specify no character, enter \FF.